2007 Interns

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The adventures of Steve Lowery and Nathan LeBaron

Cosmic Ray experiments

Orientation of Compass to Obtain Direction

CompassDirection.jpg

!

As of 7/20 we've discovered a myriad of problems with our cosmic ray telescope and system, including:

~One of our scintillators wasn't fully covered - so a good deal of our readings we're the result of the fluorescent lights overhead. This may partly explain why our singles counts we're greater in proportion to coincidence counts during the day (the lights are turned off at night in the Laboratory for Detector Science).

~Neither of the high voltage connections read accurately or consistently.

~Both PMT to NIM Bin connectors have shorted out. The first "victim" was Dr. Forest, who, mildly amused by the surprise, immediately poked the connector threateningly at Dr. Kole, who responded, "Get that the hell away from me!". Later Dr. Kole was shocked while working on the set-up anyway.

  1. NATHAN, maybe post what you did today here?#

Count Rates -vs- Paddle Separation Distance

Date Start Time End Time Detector Distance (cm) Coincidence Counts Singles Counts [math]HV_{top}[/math] [math]V{thresh}_{Top}[/math] [math]HV_{Bottom}[/math] [math]V^{bot}_{top}[/math] Angle Direction (Magnetic) Coinc/singles Coinc/Hour
7/5 11:50 am 1:20 pm 1 cm 427 NA 1480 10.17 1223 4.62 0 48 degrees NE NA ~285
7/5 1:25 pm 2:55 pm 5 cm 96 NA 1480 10.17 1223 4.62 0 48 degrees NE NA ~65.3
7/5 3:00 pm 4:31:30 pm 2.5 cm 246 NA 1480 10.17 1223 4.62 0 48 degrees NE NA ~161
7/5 to 7/6 4:55 pm 9:27 am 2.5 cm 2412 54161 1480 10.17 1223 4.62 0 48 degrees NE .004453 ~145.9
7/6 9:32 am 11:02 am 1 cm 327 4236 1480 10.17 1223 4.62 0 48 degrees NE .07720 ~218
7/6 to 7/8 11:47 am 12:30pm 10 cm 1425 124336 1480 10.17 1223 4.62 0 48 degrees NE .011461 ~29.3
7/8 to 7/9 12:35 pm 9:22 am 7.5 cm 779 53989 1480 10.17 1223 4.62 0 48 degrees NE .014429 ~37.5

Plateau Measurements for Bottom Scintillator

Date Start Time End Time Detector Distance (cm) Coincidence Counts Singles Counts [math]HV_{top}[/math] [math]V{thresh}_{Top}[/math] [math]HV_{Bottom}[/math] [math]V^{bot}_{top}[/math] Angle Direction (Magnetic) Coinc/singles Coinc/Hour Relative Error
7/9 9:34 am 11:07 am 2.5 cm 217 3696 1480 10.17 1200 4.62 0 48 degrees NE .05871 ~140 6.7%
7/9 11:08 am 1:07 pm 2.5 cm 79 4309 1480 10.17 1100 4.62 0 48 degrees NE .01833 ~39.8 11.3%
7/9 1:09 pm 2:39 pm 2.5 cm 0 3202 1480 10.17 1000 4.62 0 48 degrees NE 0 0
7/9 2:40 am 4:10 pm 2.5 cm 12 3277 1480 10.17 1050 4.62 0 48 degrees NE .003662 ~8 28.9%
*7/9 to 7/10 5:00 pm 9:11 am 2.5 cm 3314 42899 1482 10.17 1224 4.62 0 48 degrees NE .07725 ~204.8 1.7%
*7/10 9:37 am 11:07 am 2.5 cm 356 3885 1482 10.17 1401 4.62 0 48 degrees NE .09163 ~237.3 5.3%
*7/10 11:15 am 2:48 pm 2.5 cm 377 3280 1482 10.17 1350 4.62 0 48 degrees NE .1149 ~147.8 5.2%
7/10 3:12 pm 4:58 pm 2.5 cm 222 4090 1482 10.17 1500 4.62 0 48 degrees NE .05428 ~124.5 6.7%
7/10 to 7/11 4:58 pm 9:10 am 2.5 cm 2756 57030 1482 10.17 1500 4.62 0 48 degrees NE .04833 ~170.1 1.9%
7/11 9:21 am 1:02 pm 2.5 cm 558 10171 1482 10.17 1450 4.62 0 48 degrees NE .05486 ~146.2 4.2%
7/11 1:05 pm 2:35 pm 2.5 cm 233 3958 1482 10.17 1400 4.62 0 48 degrees NE .05887 ~155.3 6.6%
7/11 2:37 pm 4:07 pm 2.5 cm 215 3828 1482 10.17 1425 4.62 0 48 degrees NE .05616 ~143.3 6.8%
7/11 to 7/12 5:12 pm 9:12 am 2.5 cm 2288 49672 1482 10.17 1350 4.62 0 48 degrees NE .04606 ~143 2.1%
7/12 10:42 am 1:15 pm 2.5 cm 327 6357 1482 10.17 1375 4.62 0 48 degrees NE .05144 ~130.8 5.5%
7/12 2:00 pm 3:45 pm 2.5 cm 185 4707 1482 10.17 1275 4.62 0 48 degrees NE .03930 ~105.7 7.4%
7/12 3:49 pm 4:49 pm 2.5 cm 125 2874 1482 10.17 1475 4.62 0 48 degrees NE .04349 ~125 8.9%
7/12 to 7/13 4:49 pm 9:19 pm 2.5 cm 2462 47832 1482 10.17 1475 4.62 0 48 degrees NE .05147 ~149.2 2.0%
7/13 9:20 am 11:25 pm 2.5 cm 273 6116 1482 10.17 1350 4.62 0 48 degrees NE .04464 ~131 6.1%
7/13 11:45 am 1:45 pm 2.5 cm 237 5836 1482 10.17 1300 4.62 0 48 degrees NE .04061 ~118.5 6.5%
7/13 2:01 pm 4:01 pm 2.5 cm 264 11735 1482 10.17 1325 4.62 0 48 degrees NE .02250 ~132 6.2%
7/13 to 7/16 4:04 pm 9:14 am 2.5 cm 7631 228843 1482 10.17 1250 4.62 0 48 degrees NE .03335 ~117.1 1.1%
7/16 9:20 am 10:50 am 2.5 cm 38 5123 1482 10.17 1150 4.62 0 48 degrees NE .007418 ~25.3 16.2%
7/16 10:55 am 1:55 pm 2.5 cm 346 9612 1482 10.17 1225 4.62 0 48 degrees NE .03600 ~115.3 5.4%
7/16 3:15 pm 4:45 pm 2.5 cm 75 3805 1482 10.17 1175 4.62 0 48 degrees NE .01971 ~50 11.5%
7/18 to 7/19 4:06 pm 9:19 am 2.5 cm 1513 47542 1482 10.17 1200 4.62 0 48 degrees NE .03182 ~87.9 2.57%

Asterick means that the paddle length was interfered with. These points are not shown in the graph. Plateau2.jpg

Plateau Measurements for Top Scintillator

Date Start Time End Time Detector Distance (cm) Coincidence Counts Singles Counts [math]HV_{top}[/math] [math]V{thresh}_{Top}[/math] [math]HV_{Bottom}[/math] [math]V^{bot}_{top}[/math] Angle Direction (Magnetic) Coinc/singles Coinc/Hour Relative Error
7/17 1:53 pm 3:23 pm 2.5 cm 0 344782 1000 4.62 1450 4.62 0 48 degrees NE 0 ~0 %
7/17 3:25 pm 4:55 pm 2.5 cm 0 344190 1100 4.62 1450 4.62 0 48 degrees NE 0 ~0 %
7/17 to 7/18 4:58 pm 9:08 pm 2.5 cm 98 717200 1200 4.62 1450 4.62 0 48 degrees NE .00014 ~6.1 10.1%
7/18 9:10 am 11:10 am 2.5 cm 203 362708 1300 4.62 1450 4.62 0 48 degrees NE .000560 101.5 7.02%
7/18 11:12 am 1:18 pm 2.5 cm 252 252 1350 4.62 1450 4.62 0 48 degrees NE .000674 ~120 6.3%



Solar FLux

SolarCell.jpg

(Introduction Here)

AtmosphericAbsorption.jpg

x = Distance Most Light Travels Through the Atmosphere to Reach the Solar Cell

d = Shortest Distance from Solar Cell to Space

 = Angle Between the Ground and the Line of Variable x

I. = Intensity of Light Above the Atmosphere

I = Intensity of Light that the Solar Cell receives

µ = The absorption of the atmosphere - varies depending on certain conditions, including barometric pressure

___________________________________________________________

I = I. e^(-d/sin())

I/I. = e^(-µd/sin())

ln(I)/ln(I.) = -µd/sin()

ln(I) – ln(I.) = -µd/sin()

ln(I) = -µd/sin() + ln(I.)

Ionization Chamber

Research Bios

Nathan LeBaron

Born in 1988 on December 17th, in Las Vegas, Nevada, to the parents of Douglas and Annette LeBaron, I am currently 18 years old and have graduated from Orofino High School in Orofino, Idaho as a Co-valeodictorian. I am a very active person being the member of various clubs and groups throughout high school. I have taken 6 AP classes and several college health credits as well. I am ready to begin college this fall semester at ISU and I believe this intership will start to condition me to college life. I owe this opportunity to participate in this internship to my science teacher Mrs. Riley. She is the one that learned about it and then passed the information on to me as well as encouraging me to apply. She is also the one who taught me nearly everything I know about Physics and Chemistry. I would like to thank Mrs. Riley and all my teachers for the knowledge they have given me as well as my family and friends that have supported me through any endeavors I have taken on. Thank You.

Steve Lowery

Stephen Lowery is a high school student at Timberline in Boise. His interests include walrus husbandry, Kabbalah and the musical works of Prince.